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perf(physics): reuse reset-complete transition scratch

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Mirror retail's ten-deep LIFO transition lifetime, retain all query scratch with complete reset contracts, and remove Tier-0 enum boxing without changing collision decisions. Fresh and retained engines are bit-identical across the expanded oracle, while measured transition profiles now allocate 0 bytes per resolve.
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Erik 2026-07-25 14:37:02 +02:00
parent 2effba5127
commit 16d182c2f0
19 changed files with 3037 additions and 1228 deletions
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11
docs/plans/2026-07-25-modern-runtime-slice-i.md
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@ -1,8 +1,7 @@
# Modern runtime Slice I — flat collision assets and zero-allocation physics
**Status:** I0 COMPLETE — retail oracle, representative graph fixtures, and
four-mover allocation baselines fixed; G5 production closeout complete; I1
active
**Status:** I0–I1 COMPLETE — retail oracle, graph fixtures, and
reset-complete zero-allocation transition/query scratch fixed; I2 active
**Parent:** `2026-07-24-modern-runtime-architecture.md`, Slice I
**Purpose:** remove parsed DAT object graphs and steady collision allocations
without changing one retail collision decision, float, comparison, or traversal
@ -123,7 +122,11 @@ graph path, and no behavior code changed.
Gate: bit-identical `ResolveResult` and body side effects, no state leakage
when alternating hostile fixtures between different mover IDs, and zero
steady transition/query-scratch allocation. Close issue #237 only here.
steady transition/query-scratch allocation. **PASSED 2026-07-25:** the expanded
118-test graph oracle, structural poison/reset suite, hostile fresh-vs-reused
differential, Core/solution Release gates, and all five measured profiles pass.
Issue #237 is closed. Evidence:
[`../research/2026-07-25-slice-i1-transition-scratch.md`](../research/2026-07-25-slice-i1-transition-scratch.md).
### I2 — immutable flat collision schema and flattener